[SOLVED] Thinkpad T510, freezes on battery power

Question

My Thinkpad T510 will freeze after anything from a few seconds to a few minutes after boot. I cannot do anything except hard power off the laptop. Sometimes it freezes at the login screen, sometimes at the desktop. So far it hasn't frozen on boot. I'm using Gnome 3 and GDM. Laptop-mode which is enabled on battery and AC power. I'm using the nvidia graphics card with proprietary drivers.
I actually had a similar problem to this before, where it would freeze on battery power but much less often, usually anything from 10 minutes to hours after boot. It seemed like that problem had been fixed, but it has come back much, much worse.
I wonder if the updated Nvidia 302 drivers are to blame, but I have no idea how I might go about finding out.
Last edited by themusicalduck (2012-07-22 11:27:02)

Answer 1

EDIT: I found the laptop will still freeze once it had reached low battery power. To fix it properly, I backed up and then replaced the entire contents of /usr/lib/pm-utils/power.d/wireless with
#!/bin/sh
/sbin/iwconfig wlan0 power off
I ran the laptop down to critical battery level and had no freeze.
After hours of trawling Google, I *think* I've found a solution. At least it's been running for a good half hour now without freezing.
To fix, open up /usr/lib/pm-utils/power.d/wireless
Find the section -
case $1 in
true) wireless_powersave on ;;
false) wireless_powersave off ;;
*) exit $NA ;;
esac
and change it to -
case $1 in
true) wireless_powersave off ;;
false) wireless_powersave off ;;
*) exit $NA ;;
esac
Last edited by themusicalduck (2012-07-28 04:59:01)